Issue 1, 2011

Activation energies of photoinduced unimolecular, bimolecular and termolecular processes on silica gel surfaces

Abstract

Activation energies for energy and electron transfer have been measured in various systems on silica gel. In the case of ion-electron recombination, a facile technique involving fluorescence recovery is described which complements diffuse reflectance spectroscopy in the study of these systems. In bimolecular anthracene/azulene systems, activation energies have been shown to be independent of pre-treatment temperature in the range 25–210 °C, demonstrating that physisorbed water plays little role in determining diffusion rates on silica gel. In a ternary anthracene/azulene/perylene system, we have for the first time presented comparative activation energies for the diffusion of azulene and its radical cation, and have shown a greater activation energy for diffusion of the latter species.

Graphical abstract: Activation energies of photoinduced unimolecular, bimolecular and termolecular processes on silica gel surfaces

Article information

Article type
Paper
Submitted
13 Aug 2010
Accepted
01 Oct 2010
First published
26 Oct 2010

Photochem. Photobiol. Sci., 2011,10, 84-90

Activation energies of photoinduced unimolecular, bimolecular and termolecular processes on silica gel surfaces

S. L. Williams, D. R. Worrall, I. Kirkpatrick, A. Vancea and J. Pan, Photochem. Photobiol. Sci., 2011, 10, 84 DOI: 10.1039/C0PP00256A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements